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68701486580 = 22532909104381
BaseRepresentation
bin111111111110111011…
…010111110111110100
320120022220222010022222
4333332323113313310
52111200040032310
651321103141512
74651326000146
oct777673276764
9216286863288
1068701486580
112715521a791
1211393ba4898
13662b41020c
14347a3a0c96
151bc1616055
hexffeed7df4

68701486580 has 24 divisors (see below), whose sum is σ = 144278888040. Its totient is φ = 27479496320.

The previous prime is 68701486517. The next prime is 68701486583. The reversal of 68701486580 is 8568410786.

It can be written as a sum of positive squares in 4 ways, for example, as 23680285456 + 45021201124 = 153884^2 + 212182^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68701486583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605990 + ... + 710370.

It is an arithmetic number, because the mean of its divisors is an integer number (6011620335).

Almost surely, 268701486580 is an apocalyptic number.

It is an amenable number.

68701486580 is an abundant number, since it is smaller than the sum of its proper divisors (75577401460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68701486580 is a wasteful number, since it uses less digits than its factorization.

68701486580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137299 (or 137297 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 53.

The spelling of 68701486580 in words is "sixty-eight billion, seven hundred one million, four hundred eighty-six thousand, five hundred eighty".

Divisors: 1 2 4 5 10 20 32909 65818 104381 131636 164545 208762 329090 417524 521905 658180 1043810 2087620 3435074329 6870148658 13740297316 17175371645 34350743290 68701486580